Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Data.Entity/System/Data/Objects/MergeOption.cs

@@ -0,0 +1,38 @@
+//------------------------------------------------------------------------------
+// <copyright file="MergeOption.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner       [....]
+// @backupOwner [....]
+//------------------------------------------------------------------------------
+
+namespace System.Data.Objects {
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public enum MergeOption {
+
+        /// <summary>
+        /// Will only append new (top level-unique) rows.  This is the default behavior.
+        /// </summary>
+        AppendOnly = 0,
+
+        /// <summary>
+        /// Same behavior as LoadOption.OverwriteChanges.
+        /// </summary>
+        OverwriteChanges      = LoadOption.OverwriteChanges,
+
+        /// <summary>
+        /// Same behavior as LoadOption.PreserveChanges.
+        /// </summary>
+        PreserveChanges       = LoadOption.PreserveChanges,
+
+        /// <summary>
+        /// Will not modify cache.
+        /// </summary>
+        NoTracking = 3,
+    }
+}
+